Re: what creek is it ?
I think you were following along side "Laurel Creek". It is the creek that you cross several times as you go west toward Cades Cove.. If you were "in" Cades Cove then you would be in the headwaters of Abrams Creek.
ALL of the streams in the Park are wild trout.....not sure why you couldn't catch any fish.....which fly were you using ?...What time of day ?
Not sure if this helps or not ...be glad to help any way I can